Omron V680-CA5D01-V2 User Manual page 119

SECTION 5
Communications
Commands for Tag Communications
This section describes the commands that are used to communicate with Tags.
READ (RD)
The READ command reads up to 2 KB of data from a Tag.
1:1 Protocol
Command
Communi-
cations
Command
designation
code
×
R D
2
Communications designa-
tion
Data designation
Antenna designation
UID
Read area start address
No. of bytes to read
Response
Communications Designation Other Than PA or PI
Command
code
End code
0
R D
2
Communications Designation of PA or PI
Command
code End code
R D 0
2
UID
Read data
RFID System
116
User's Manual
Antenna designation
Data
desig-
UID
nation
...
× × × ×
A/H 1/2
2 1 1 0 or 16
Specifies the method of communications with the Tag.
Refer to Communications Designation Function for details on the communications designation.
p. 103
Specifies the code format when sending the read data response.
"A": ASCII
"H": Hexadecimal
Specifies the Antenna with which to communicate.
"1": Antenna 1
"2": Antenna 2
A unique identifier used to identify Tags.
Added only for the selective communications designation (SL).
Specifies the start address of the area in the Tag from which data is to be read from in 4-digit
hexadecimal.
Setting range: 0000
Specifies the number of bytes to read from the Tag in 4-digit hexadecimal.
Up to 2 KB can be read with one command.
Setting range: 0001
• 1000 Byte Tags (V680-D1KP@@)
ASCII: 1000 bytes (1000 characters)
Hexadecimal: 1000 bytes (2000 characters)
• 8-/32-KB Tags (V680-D8KF68/-D32KF68)
ASCII: 2048 bytes (2048 characters)
Hexadecimal: 2048 bytes (4096 characters)
Antenna
Resend flag
desig-
UID
nation
× × × ... ×
0
0
2 1 1 0 or 16
Resend
Antenna
flag
designa-
tion Terminator
× *
1 0 CR
2 1 1 2
A unique identifier used to identify Tags.
Added in the following cases:
• Added when the ADD UID (US) command is set to add a UID.
• Added for multi-access communications designations (MT/MR).
The data read from the Tag.
The number of characters will be the same as the specified number of bytes to read for ASCII
data and twice that number for hexadecimal data.
Read area start address
No. of bytes to read
× × × × × × ×
4 4
to FFFF
H H
to 0800
H H
Read data
Terminator
× × × ... × × *
CR
n 2
Terminator
× × *
CR
2
• 2000 Byte Tags (V680-D2KF@@)
ASCII: 2000 bytes (2000 characters)
Hexadecimal: 2000 bytes (4000 characters)